/**
 * Copyright (C) 2011 Whisper Systems
 * Copyright (C) 2013 Open Whisper Systems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.thoughtcrime.securesms.crypto;

import android.content.Context;

import org.thoughtcrime.securesms.crypto.protocol.KeyExchangeMessage;
import org.thoughtcrime.securesms.recipients.Recipient;
import org.whispersystems.textsecure.crypto.InvalidMessageException;
import org.whispersystems.textsecure.crypto.MasterSecret;

public abstract class KeyExchangeProcessor {

  public static final String SECURITY_UPDATE_EVENT = "org.thoughtcrime.securesms.KEY_EXCHANGE_UPDATE";

  public abstract boolean isStale(KeyExchangeMessage message);
  public abstract boolean isTrusted(KeyExchangeMessage message);
  public abstract void processKeyExchangeMessage(KeyExchangeMessage message, long threadid)
      throws InvalidMessageException;

  public static KeyExchangeProcessor createFor(Context context, MasterSecret masterSecret,
                                               Recipient recipient, KeyExchangeMessage message)
  {
    if (message.isLegacy()) return new KeyExchangeProcessorV1(context, masterSecret, recipient);
    else                    return new KeyExchangeProcessorV2(context, masterSecret, recipient);
  }
}